R-R interval variation in healthy subjects.

ABSTRACT

This study was performed to establish normal data for R-R interval variation in order to study parasympathetic heart rate control in subject with autonomic neuropathy. R-R interval variation or heart rate change was measured in 50 healthy subjects aged 16-53 (30.52 + 8.8) years using electromyographic equipment. The studies were performed at rest and deep breathing was 19.34 + 7.26 and 39.18 + 14.14 respectively. The difference between maximal and minimal heart rate at rest and deep breathing was 14.56 + 5.38 and 29.38 + 10.06 beat per minute respectively.